docs: fix deadlink

Author: laysakura

c_example/README.md

@@ -47,7 +47,7 @@ Finally the example app runs.
 
 ## License
 
-Licensed under either of [Apache License, Version 2.0](LICENSE-APACHE) or [MIT license](LICENSE-MIT) at your option.
+Licensed under either of [Apache License, Version 2.0](../LICENSE-APACHE) or [MIT license](../LICENSE-MIT) at your option.
 
 Unless you explicitly state otherwise, any contribution intentionally submitted
 for inclusion in SpringQL by you, as defined in the Apache-2.0 license, shall be